In a felony case, the purpose of a grand jury is to a. judge on a civil indictment. b. judge the merits of the case against the state constitution. c. decide if the offender should be tried by a jury. d. decide if the evidence warrants prosecution.

I believe It's d. decide if the evidence warrants prosecution. Hope this helps :)

a. because the u.s. was the leading with the most technology, economy, etc. also was teamed with other allies witch boosted the economy and materials to improve technology and use it.

first second and third

explanation: