Sexual prejudice is correlated with which of the following personality types?

By age 30, the skin is ______ and ______

Fill in the blank with correct word

In the problem prepared by Duncker (3 boxes, matches, tacks, and candles) to make a lamp, some research participants failed because:

A) the tacks couldn't hold the lamp B) they were not aware that matches were in the boxes C) the supplies were presented inside the box D) the matches were wet E) the research participants were drawn from a small eastern college