Explanation

Cumulonimbus clouds — the towering thunderheads — grow out of cumulus congestus, the tall cauliflower-shaped cumulus stage. When atmospheric instability continues, the congestus top spreads into the characteristic anvil of the cumulonimbus. Nimbostratus, altostratus and cirrocumulus are layered or high clouds that do not develop into cumulonimbus. Hence option A is correct.