In Act II, Scene iii of "The Tragedy of Romeo and Juliet," Friar Lawrence reacts to Romeo’s news and plans in the following ways:
A. He is concerned that Romeo may forget Juliet as quickly as he forgot Rosaline. B. He urges Romeo to get to know Juliet better before rushing into marriage.
These options reflect Friar Lawrence's cautious nature and his concern for the impulsive nature of young love.