See the multi-choice question below:

Sentence 1: A key difference between measuring the nation's saving and gauging a household's finances is the treatment of changes in the market value of existing assets.

Sentence 2: There is a difference between measuring the nation's saving and gauging a household's finances.

If the first sentence is true, then is the second sentence true?
[I] yes. [II] it is not possible to tell. [III] no.
[I]