Final answer:
Depo-Provera is a good option for a client in the mid forties and who smokes because it contains only progesterone, not estrogen. It effectively prevents ovulation and thickens cervical mucus for contraception.
Step-by-step explanation:
The birth control option Depo-Provera is a hormone injection that typically contains only progesterone, not estrogen. It is considered a good option for a client in the mid forties and who smokes because it does not contain estrogen, which can increase the risk of blood clots, especially in smokers.
By using only progesterone, Depo-Provera still effectively prevents ovulation and thickens cervical mucus, providing effective contraception.