hello mike,
1) London (differs from) other cities, (such as) Paris and New York, (in that) its shopping areas are so (widely) spread out. (No error). i chose c because that refers to any of the three cities,
can u please explain. the answer is E

The increase in hours they are required to work in an understaffed, unsupportive situation (have angered the nurses at West Branch Home and threatened a walkout).
B) has angered the nurses at West Branch Home and caused them to threaten a walkout
E) has angered the nurses at West Branch Home to have a walkout
the answer is (B) but i don’t know why. (E) is more concise and seems to be grammatically correct as well. HELP MIKE!!!

some critics insist that aleksandr solzhenitsyn, although a great humanitarian, is only a mediocre writer.

a)although a great humanitarian, is only a mediocre writer.
b)despite great humanitarianism, is only mediocre when judged as to writing
c) even when being judged a great humanitarian, is a mediocre writer only
d)even when noted for his great humanitarianism, only a mediocre writer
e)while being a great humanitarian, but only a mediocre writer

New research indicates that regular aerobic exercise can improve brain performance by its boosting of memory and cognitive processing speed.

a)performance by its boosting of
b)performance by boosting of
c)performance by boosting
d)performance, its boost of
e)performance, it boosts

Correctly written sentence:
The proposed methods for controlling pollution were presented (more as temporary remedies than as) permanent solutions to the problem.

Why would this answer choice be wrong?: (as more temporary remedies than)