I think that it is B: Joyful, because there is no distress, such as, "Hurry, the queen has been killed!" or an angry description. The tone is very calm but the best answer would be joyful, as singing is usually joyful.
Advised
behaving as someone, especially the speaker, would recommend; sensible; wise.
I`m assuming the underlined word is dearth, so
the answer is a. shortage
C. because in modern music things are drastically different. People want to hear something new and different. Also, this answer is not like any of the other options.<span />