Even if only the tall trait appears in the first generation, why can the dwarf trait not be considered destroyed?

Correct answer: Because it can remain present in a hidden hereditary form

In a Mendelian cross, a dominant allele can mask the expression of a recessive allele in the heterozygous first-generation offspring. The recessive allele is not destroyed; it remains part of the genotype and can pass into gametes. When two offspring contribute that recessive allele to a later generation, the dwarf phenotype can reappear. Therefore option A is correct. The other choices deny inheritance or describe biologically impossible events.