Sentence Correction

The correct usage is: require that X do Y
Only A, C and D uses correct verb form - disclose. A and D have wrong pronouns. A should use its and D should use there.
C is the clear winner.

~Binit.

akash singhal wrote:SEC regulations require that a public
company disclose to their potential investors
any legal, technological, or financial
complications that could endanger their
investments.

A. a public company disclose to their
B. a public company discloses to its
C. a public company disclose to its
D. public companies disclose to its
E. public companies have disclosed to their

In A, their (plural) does not agree with company (singular).
In D, its (singular) does not agree with companies (plural).
Eliminate A and D.

One purpose of the subjunctive mood is to express an action that is HYPOTHETICAL: an action that might not actually happen.
When we demand an action, we cannot be certain that our demand will be met.
Because the demanded action might not actually happen, we use the COMMAND SUBJUNCTIVE.
The structure of the command subjunctive is as follows:
BOSSY WORD + that + NOUN + BARE INFINITIVE.
Examples of bossy words: demand, dictate, mandate, etc.
The bare infinitive is the infinitive form of a verb with the to omitted.

Example:
The attorneys demanded that the new contract be implemented.
In the sentence above:
Bossy word = demanded.
that + NOUN = that the new contract.
Bare infinitive = be implemented (to be implemented with the to omitted).

In the SC above, require that (BOSSY WORD + that) must be followed by the command subjunctive:
SEC regulations require that a public company DISCLOSE...complications.
Here:
Bossy word = require.
that + NOUN = that a public company.
Bare infinitive = disclose (to disclose with the to omitted).

Of the remaining answer choices, only C offers the required subjunctive mood.

The correct answer is C.