What action did the speaker take regarding their friend's input?

The correct choice indicates that the speaker accepted their friend's suggestion, which means they acknowledged the advice or recommendation made by their friend and chose to adopt it in some form. Accepting a suggestion involves recognizing its value and deciding to incorporate it into one's own thinking or actions. This could involve implementing the idea as is, or it could be seen as an endorsement of the friend's perspective. The positive nature of this response highlights openness to collaboration and appreciation for the friend's input, which can strengthen interpersonal relationships.