Athletes' motivation, the level of competition, the type of sport, and the are the key factors in determining the probability of using anabolic steroids. A. pressure for winning B. age of the athlete C. price of this drug D. expectations of the fans

A.

Explanation:

Definitely the goal of any athletes is to win a  laurel, so that  the energy put into timeless training can be consummated. Therefore the spirit of wining at all cost usually drive most athletes to spike up their systems to  achieve their dreams. Most athletes are  determined to win to satisfy the sponsor, family and relations. Besides coaches who want their work output to be noticed usually led   athletes to spike the systems with steroid .  Besides distractions by social levels, and need to meet up with time wasted ,made some athletes to spike systems.

Thus this collective efforts put pressure on the athletes to win at all cost.

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both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.