In pea plants, the allele for tall (T) is dominant to the allele for short (t). Which of the following is the percent of offspring that will be tall if a heterozygous plant (Tt) is crossed with a homozygous tall plant?

Question

In pea plants, the allele for tall (T) is dominant to the allele for short (t). Which of the following is the percent of offspring that will be tall if a heterozygous plant (Tt) is crossed with a homozygous tall plant? 
A. 100% 
B. 75% 
C. 50% 
D. 25% 
i think its A because Genotype: If T is dominant to t, and a homozygous TT plant is crossed with a heterzygous plant (Tt), then each of the offspring produced by the homozygous dominant parent plant will have to contain a T.
Phenotype: Any individual with a T will be tall.

Which of the following describes the classification of humans?
A. The genus  and the species sapiens
B. The phyla  and the species sapiens
C. The family sapiens and the genus 
D. The class sapiens and the genus 
im lost on this one but i think its A