What did mendel's cross-pollination of pea plants prove?

hereditary factors do not combine but are passed on in the same form they were inherited.

dominant traits are always expressed and recessive traits are always hidden.

factors carry the code for proteins in segments of dna.

different offspring of the same parents inherit identical characteristics.

From the cross-pollination experiment done by Mendel, the findings can be summarized into: (1) principle of segregation, and (2) principle of independent assortment. According to the first principle, the pair of alleles of each parent separate and only one from each parent can be passed on to the offspring. This is most likely saying like that of the first sentence. 

Ithink it’s c or b for the answer.