One can infer from the reading that -
A
dolphins are quite abundant in some areas of the world
B
dolphins have skills that no other living creatures have, such as the ability to think
C
it is not usual for dolphins to communicate with each other
D
dolphins have some social traits that are similar to those of humans
Correct Answer: dolphins have some social traits that are similar to those of humans
passage থেকে বোঝা যায়, মানুষের মতো ডলফিনের কিছু সামাজিক নিয়ম রয়েছে।