Which of the following examples best defines the concept "life course effects"? a. Whether one completes high school affects how often they watch the reality TV show Keeping Up with the Kardashians. b. Taking piano lessons as a child affects the types of novels one reads as an adult. c. The number of guests at a couple's wedding affects the number of pets they will have. d. The amount of income one earns during their peak years of employment affects the age at which they can retire. e. Growing vegetables in one's garden affects the amount of income tax one will pay the following year