B because he knows he can see something when he is almost home
The expression "her heart was throbbing" implies that her heart was ultimately beating or pounding. It is to beat rapidly or violently. In simpler words, it just means that her heart was beating fast due to an emotional outburst. Hope this answers your question. Have a great day!
No, it does not according to the study. the study states it is just a placebo effect (it works because you expect it to.)
