Final answer:
In the book, Rubin said to wear dark clothing and comfortable shoes for the raid on a German supply train.
Step-by-step explanation:
In the book Resistance, Rubin instructed to wear dark clothing and comfortable shoes for the raid on a German supply train. The correct answer to the student's question is (a) Dark clothing and comfortable shoes, as this would have allowed the resistors to blend in with the night and move more stealthily and swiftly. This detail is in line with the various forms of resistance movements against the Nazis during World War II, where subterfuge and camouflage were crucial for the success of operations against German forces and the sabotage of their supply lines.