It is C) cell-mediated response
The correct answer is: B) Different traits are inherited separately.
Mendel’s conclusions as a result of his experiments with dihybrid crosses are known as Mendel’s laws.
• Mendel’s law of Segregation: During the gametes formation (meiosis), alleles are separated so that each gamete carries only one allele for each gene
• Mendel’s law of Independent Assortment: The segregation of alleles of one gene is independent to that of any other gene
Mendel also defined the Principle of Dominance: Recessive alleles will be masked by dominant alleles when are together in heterozygous genotype.
I am not sure but I am guessing carbon and nitrogen :)