Answer:
A) feet per second
Step-by-step explanation:
Marian should start with the units used to measure her performance. Very likely, her times will be measured in seconds. Her distances may very well be measured in yards if she runs a 50- or 100-yard dash. If she runs a 440-yard race (1/4 mile), miles per second may be appropriate units to start with.
In modern times, races are measured in meters, rather than feet or yards.
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For this unfortunate question, my guess is "feet per second."
