Which sentence is written correctly?
a.
have the united states marine corps been a part of the united states armed forces since 1775?
b.
have you thought about how there is lots of stories in the bible that involve miraculous events?
c.
there is many retired couples who travel overseas together after retiring from the workforce.
d.
of great concern to scientists is the controlled growth of bacteria cultures in test tubes.

The institute of international research is holding its annual convention. this year more than 500 scholars have been invited to hear research reports on many timely topics. approximately 250 big name scientists will be winging their way to washington, d.c. how can the underlined sentence be revised so that it fits the tone of the passage? a) approximately 250 people will be in washington, d.c. b) approximately 250 bigwigs will be flying to washington, d.c. c) approximately 250 science people will be going to washington, d.c. d) approximately 250 well-known scientists will be arriving in washington, d.c.