Final answer:
The speed of the snail is 15/7 feet per minute.
Step-by-step explanation:
To find the speed of the snail, we need to divide the distance traveled by the time it takes. The snail travels 3/7 foot in 1/5 minute. So, the speed of the snail is (3/7)/(1/5) = (3/7) * (5/1) = 15/7 feet per minute.
Therefore, the correct answer is A) 35/21 ft/min.