Which sentence from the article would be MOST important to include in a summary of the article? Question 1 options:

A. The animals, in this case captive Asian elephants (Elephas maximus), offer something similar to humans' sympathetic concern when observing distress in another, including their relatives and friends.

B. The elephants were of varying ages at the Elephants Nature Park in the Mae Tang district of Chiang Mai Province, Thailand.

C. The herds usually include related females, babies and younger males, who have long been known to bond strongly with their kind.

D. This kind of evolution occurs when similar traits or behaviors evolve separately as a result of similar environmental pressures.