The number of senators would increase only if a. another state joined the united states b. the population of the united states increased c. congress voted for an increase in special session d. congress passed a constitutional amendment

I believe the answer is: A.another state joined the United States

Each states in united states has the right to send two senators to represent their state in U.S Senate. The number of senators would not be influenced by the number of population of the states. So, the number of senators could only be increased if there is other state beside the current 50 roster to be included and join united states (for example, puerto Rico is a strong candidate for this state addition)

its tr3way you already know

i believe the answer is: description

description refers to the goal of psychologist to identify the phenomenon that being observed. this goal is being actualized by collecting data/information from various clues that observed through the phenomenon. this goal must be accomplished before pyschologist able to create methods of treatment.