According to the poem "hanging fire" all of the following are holding back the speaker except?
a)age
b)skin
c)braces
d)illness

D. The narrator of the poem is a fourteen year old boy, who has lost confidence in himself because of his age and going older (lines 1-4); by his skin breaking out (line 2); the braces he wears (line 30); and due to his paranoia of dying young (lines 8, 15, 32). Illness is not implied as holding him back. 

Is there more to this?