Read this excerpt from "President Kennedy's Speech at Rice University." If this capsule history of our progress teaches us anything, it is that man, in his quest for knowledge and progress, is determined and cannot be deterred.

What is the meaning of deterred as it is used in this excerpt?

questioned
rushed into
rewarded
held back

Held back

Explanation:

Just in case you want to use a different word look at the definitions:

Definitions of deterred . . .

Prevent the occurrence of.

"strategists think not only about how to deter war, but about how war might occur"

Discourage (someone) from doing something by instilling doubt or fear of the consequences.

"only a health problem would deter him from seeking re-election"