With this assignment been stuck on it for a while.

The development of new inventions in the field of space travel seemed rapid. how does the word rapid function in a sentence?

What language uses emotionally words

How can you avoid the problem of groupthink? a. by choosing a group leader to direct the group b. by composing the team of only like-minded individuals c. by encouraging all members to voice their opinions d. by keeping quiet when you disagree with another group member's opinion