Congressional leaders form committees when they want to take up an issue that falls between the jurisdiction of existing committees, to highlight an issue, or to investigate a particular problem.
A. conference
B. joint
C. select
D. standing

Conference

Explanation:

Congressional leaders form CONFERENCE committees when they want to take up an issue that falls between the jurisdiction of existing committees, to highlight an issue, or to investigate a particular problem.

the   square   deal   was   a   program   where   the   government gave any one   a fair   chance   to succeed

the answer to your question is a. the salt plains

in 1811, he led an expedition, known as the george c. sibley expedition, to improve relations with the pawnee and kansa tribes, and also to locate the rumored jefferson's salt mountain