Which of the Following Describes Why Mendel Continued Some of His

Which of the following describes why Mendel continued some of his experiments into the F2 or F3 generation?

A) Collecting data from more generations allowed him to obtain a larger number of offspring.
B) Following multiple generations allowed him to determine whether a recessive trait would reappear.
C) Determining whether a dominant trait would reappear required multiple dihybrid crosses.
D) Data from the F1 generation did not allow him to distinguish which alleles were segregating