Sentence Correction

Although the restaurant company has recently added many new restaurants across the country and its sales have increased dramatically, its sales at restaurants open for more than a year have declined.

A) the restaurant company has recently added many new restaurants across the country and its sales have increased dramatically

B) the restaurant company has recently added many new restaurants across the country and its sales increased dramatically, its

C) many new restaurants have recently been opened across the country and its sales increased dramatically, the restaurant company's

d) having recently added many new restaurants across the country and with its sales increasing dramatically, the restaurant company's

e) recently adding many new restaurants across the country and having its sales increase dramatically, the restaurant company's

How do we split instead of reading horizontal how we crack this vertically or is there a better way.
Source Gmat prep

A IMO.

PLEASE underline the relevant portion of the SC.

Although the restaurant company has recently added many new restaurants across the country and its sales have increased dramatically, its sales at restaurants open for more than a year have declined.

A. the restaurant company has recently added many new restaurants across the country and its sales have increased dramatically, its
B. the restaurant company has recently added many new restaurants across the country and its sales increased dramatically, its
C. many new restaurants have recently been opened across the country and its sales increased dramatically, the restaurant company's
D. having recently added many new restaurants across the country and with its sales increasing dramatically, the restaurant company's
E. recently adding many new restaurants across the country and having its sales increase dramatically, the restaurant company's

STAY IN ONE TENSE unless a change in tense is required.
In B, increased is in the simple past tense, while the other verbs (has added, have declined) are in the present perfect tense.
Since the switch from the present perfect to the simple past is not necessary, eliminate B.

In C, its (singular) seems to refer to many new restaurants (plural).
A singular pronoun cannot serve to refer to a plural antecedent.
Eliminate C.

In D, having recently added seems to refer to the restaurant company's sales, implying that the SALES recently ADDED many new restaurants -- a nonsensical meaning.
Eliminate D.

In E, recently adding seems to refer to the restaurant company's sales, implying that the SALES were recently ADDING many new restaurants -- a nonsensical meaning.
Eliminate E.

The correct answer is A.