What type of claim does the speaker make in these lines?

The first step to be taken is the step that we are taking now. That is, to attempt a settlement of these existing problems of Reparation. . . .
A.
a definition
B.
an analogy
C.
a cause
D.
a testimony

Highlight all instances of parallel structure. there is no longer any room for hope. if we wish to be free—if we mean to preserve inviolate those inestimable privileges for which we have been so long contending—if we mean not basely to abandon the noble struggle in which we have been so long engaged, and which we have pledged ourselves never to abandon until the glorious object of our contest shall be obtained—we must fight!