Which cause-and-effect relationship in "Broken Chain" relates to the theme "Even when you have problems with your family, in the end you can count on them"?
a. Cause: Alfonso frees Frankie from the top of a barbed-wire fence. Effect: Sandra is grateful.
b. Cause: Sandra's mother has to work. Effect: Sandra has to take care of Frankie.
c. Cause: Ernie lends Alfonso his bike. Effect: Alfonso can go on his first date with Sandra.
d. Cause: Alfonso may have found a girlfriend. Effect: Ernie is secretly jealous of him.