An author makes the following claim in research paper: "Research is moving in a direction to resolve issues related to global obesity. We are all facing this global obesity crisis together." What is unclear in the second sentence of this quote?

a. it is unclear whether we refers to the authors of the article, community members, or to some other group
b. it is unclear whether global obesity is the issue that needs to be resolved
c. it is unclear whether global obesity is a crisis
d. all of the above