Couldn't find a satisfactory explanation in any of the previous posts and my doubt stands like this:Organized in 1966 by the Fish and Wildlife Service, the Breeding Bird Survey uses annual roadside counts
along established routes for monitoring of population changes of as many as. or of more than 250 bird
species, including 180 songbirds.
(A) for monitoring of population changes of as many as, or of
(B) to monitor population changes of as many, or
(C) to monitor changes in the populations of
(D) that monitors population changes of
(E) that monitors changes in populations of as many as, or
OG Expl'n:
1. for monitoring of in A is less concise and idiomatic than to monitor, and population changes in B is less precise than changes in population.
- HOW??
2. In D and E, the pronoun that has no singular noun (required by the verb monitors) to which it can logically or grammatically refer. Survey already has its verb in uses, and no other noun can perform the action of monitors
- THAT APPEARS TO BE REFERRING TO SURVEY (NOUN) ??
Please elaborate on the possible uses of "THAT" besides: 1. being used to introduce a clause
