Q266218 - EN - 2011 - ESCOLA NAVAL - Aspirante - Português e Inglês

Which alternative below is CORRECT, based –on the text above?

a) The word "stuff" (line 4) refers to "glass".
b) The word "others" (line 13) refers "acoustic signals".
c) The word "it" (line 14) refers to "the pane".
d) The word "which" (line 15) refers to "defective".
e) The word "that" (line 21) refers to "modules".