Which sentence contains a dangling modifier?
a. upon taking the field, the player was hit by a foul ball.
b. when operating heavy machinery, one must use caution.
c. upon bestowing the awards, the mayor congratulated all the participants.
d. upon hearing the fire engines, the apartment building was evacuated.

Click on the box to choose whether each sentence restates the key idea expressed in the key sentence. key idea: it is sometimes necessary to adjust yourself to those who fail to adjust to you. people like to have their own way. (does) (does not) restate the idea? animals are required to adjust their living patterns to their environment. (does) (does not) restate the idea? people often find it necessary to make adjustments in their lives because others won't. (does) (does not) restate the idea? we should treat others like we would want to be treated. (does) (does not) restate the idea? some people refuse to change. (does) (does not) restate the idea? others' refusal to change for us may mean that we must change for them. (does) (does not) restate the idea? others' failure to change provides the basis for our own refusal to change. (does) (does not) restate the idea? sometimes we need to stay the same, even when others change. (does) (does not) restate the idea? insisting that others adjust to us will prevent us from having to adjust to others. (does) (does not) restate the idea? if we don't agree with others, we should act as though we do. (does) (does not) restate the idea?