Given below are four jumbled sentences. Out of the given options pick the one that gives
their correct order.
A. When a calf is born under water, the mother must get it to the surface before it drowns.
B. The young ones remain with their parents for up to fifteen years or more.
C. Often another whale assists the mother nudging the baby gently and encouraging it to
swim.
D. Whales have highly developed maternal instincts.