Identify the following statements as true (T) or false (F), and select the correct option.

A. The pistil has the ability to recognize the pollen with respect to its compatibility.

B. Pollen tube discharges its male gametes on degenerating synergids.

C. Emasculation is required when a female parent produces unisexual flowers.

D. Bagging prevents contamination of stigma with unwanted pollen.