The following is an example of what kind of paragraph?

We've looked at the various strengths and weaknesses of
the three major green-building methods — adobe,
straw bale, and rammed earth — as environmentally
sound building materials. We considered each in terms of
variables you're likely to encounter on the build site. This should give you the information you need in order to make decisions as to which material will work best for you.

A. Topical
B. Transitional
C. Concluding
D. Introductory ​