C. Being willing to show affection
You need to let the other person know that you care. Being willing to show affection can, therefore, help to build a romantic relationship.
Providing honest criticism can probably help with a friendship to some extent, but it has little to do with romancing.
Doing work around the house is nice, but it does not necessarily build or strengthen a romantic relationship.
Doing most of the talking can actually be a turnoff.
Hope this helps.