What kind of information is included in a political platform? positions and opinions related to current issues
lists of people who form a committee
additional sources of information about issues
questions that citizens should ask themselves

positions and opinions related to current issues

Explanation:

Political platforms is a set of principles that a certain political party use to address various issues in the country. These sets of principle will influence the way each party plan to deal with those issues.

Even if two political parties are facing the same issue,  they both can have two completely different political platform to address it.

For example,

When talking about the issue of poverty, Republican party tend to use lowering tax and giving market incentives as their political platform. The Democratic party on the other hand tend to use distribution of welfare as their political platform.

even though you have attached neither the chart nor the generalizations, i have located them online. the right answer is d, since they are asking you about a generalization. you can only infer from the chart that between 2008 and 2009 the number of employed workers decreased significantly (from over 115 millions to 107 millions approximately), which signals some type of economic crisis.