What can courtney change in her experiment to find the true impact of
the type of meals she eats on her race time?
select one:
a. for two weeks of her study, she can eat her high protein meal
for breakfast and high carbohydrate meal for lunch; she should
then switch the meals for the last two weeks.
b. she should try running a longer distance after lunch since
she seems to be faster regardless of her meal. c. she should only eat her high protein meals for breakfast and
only eat her high carbohydrate meals for lunch for all four weeks
of her study. d. she should eat only protein meals on some days and only
carbohydrate meals on other days, which can be determined by a
coin toss.