One of the primary benefits of a survey is that they a. can generate cause-and-effect conclusions b. allow efficient gathering of unobservable phenomena c. allow for researchers to observe one’s natural behavior d. are able to provide a detailed look at a single subject

I believe the answer is: b. allow efficient gathering of unobservant phenomena

Survey is conducted by letting the subject to fill up a set of questionaires by their own without the supervision of the researchers. Because of this, gathering needed information became extremely efficient since it can be conducted with very little labor resource and could take up large number of population.

the minoan civilization flourished in the middle bronze age on the island of crete located in the eastern mediterranean from c. 2000 bce until c. 1500 bce. with their unique art and architecture, and the spread of their ideas through contact with other cultures across the aegean, the minoans made a significant contribution to the development of western european civilization as it is known today. labyrinth-like palace complexes, vivid frescoes depicting scenes such as bull-leaping and processions, fine gold jewelry, elegant stone vases, and pottery with vibrant decorations of marine life are all particular features of minoan crete.  

so basically their unique way of ding arts, as well as architecture.

answer is b shrapnel injuries