a)     Prabhupada participated by moving with the Rath all through
b)     Prabhupada stayed in his house at Stinson beach and watched the Rath from his living room
c)     Prabhupada moved with Rath for a while and then took rest
d)     Prabhupada was at New York

The correct answer is  
b)     Prabhupada stayed in his house at Stinson beach and watched the Rath from his living room