A question is given, followed by three statements labelled I, II and
III. Identify which of the statements is/are sufficient to answer the question. Question: What is the value of A when D = 7? Statements:
I. A varies directly with the sum of B and C, B varies directly with D and C varies directly with D².
II. When D = 3, A = 33.
III. When D = 4, A = 52.