Question when-p

3.3 Transitions - Additive transitions (also, moreover)
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When printing paper money for the colony of Pennsylvania in the 1730s, Benjamin Franklin—then a Philadelphia shop owner—took steps to combat the circulation of counterfeit notes, such as weaving blue threads and muscovite (a reflective mineral) into the paper he used. blank he stamped the notes with detailed imprints of sage leaves that proved difficult for forgers to replie.

Which choice completes the text with the most logical transition?

A.

Specifically,

B.

That said,

C.

For example, 

D.

Moreover,