What is true in the process of fertilization [MP PMT 1990; KCET 1994]

• A. Only one sperm reaches the egg and enters it
• B. The entry of sperm activates the egg for completing meiosis
• C. Two haploid nuclei fuse and immediately divide to produce two nuclei which are again haploid
• D. Only the acrosome of the sperm enters the egg