In 1886, Gregor Mendel presented the results of painstaking experiments on inheritance on garden pea. According to Mendel, the first law of inheritance where each organism contains two alleles for each trait, and the alleles separate during the formation of gametes is known as:

Group of answer choices:
A. Natural Selection
B. Law of Segregation
C. Law of Thermodynamics
D. Law of Independent Assortment
E. Law of Gravity