Which sentence from the text best shows the authors intent to describe the type of information the Kepler mission is gathering

modal adverbs are used to modify specific verbs that consist of a linking verb (verb of being) and sometimes another verb. examples of modal verbs include can, could, may, might, must, shall, should, will and would.

modal auxiliary. an auxiliary verb characteristically used with other verbs to express mood, aspect, or tense. in english, the most common modal auxiliaries are can, could, may, might, must, ought, shall, should, will, and would. also called modal .

i wonder if it is possible to place reagans testimony and paragragh 18, so we can compare and contract the ideas in the text.