The reason that Michele Hoffnung undertook her research was because

The reason that Michele Hoffnung undertook her research was because
 
  a. she felt alienated from her job and wanted to understand whether dual career families experienced high levels of stress.
  b. she was a working mother and was interested in learning how young women balanced work and family demands.
  c. there was an opportunity to apply for a large research grant to support the investigation.
  d. although she had no personal interest in the topic, she thought that the topic of working mothers was a very important social issue.
  e. none of these.