A. the tree
it is the most clear
D. The social context of the 1960's discouraged innovation and exploration because people were afraid of new technologies and feared being overrun by space aliens.
Answer:
When you came back, she already cleaned the house.
He felt sorry that he hurt his father so much.
When I finished my homework I helped father in the garden.
The policeman said he witnessed the whole scene himself.
Mother hung the clothes on the line after she washed them.
The firemen arrived only a few minutes after our neighbor telephoned them.
Explanation:
Very much explantory.
Answer:D. The U.S department of education federal loan