<span>I found the missing choices, these are:
Cardiorespiratory endurance
Body composition
Flexibility
Muscular strength
Rosalyn's area of fitness that needs to improve is MUSCULAR STRENGTH.
Muscular strength is defined as the </span><span>amount of force a </span>muscle<span> can produce with a single maximal effort. In Rosalyn's case, she needs to develop her arm muscles to enable her to hold her cousin's baby without feeling any fatigue.</span>
Answer:
the answer will be A.Research cannot use both qualitative and quantitative methods in a study.