King Charles II of Spain was the product of generations of inbreeding. He was infertile, had a jaw deformation that prevented him from being able to eat solid food, and had several other genetic medical conditions. Which of the following correctly explains the relationship between his family inbreeding and his medical conditions?
a. Inbreeding increases the probability that his lineage will be affected by horizontally transmitted sexually transmitted diseases
b. Inbreeding decreases the probability of adapting to new conditions due to decreasing the genetic variation in his gene-pool
c. Inbreeding increases the probability that deleterious alleles will be homozygous and, therefore, expressed