A "...'killing' (...) 'bacteria'..." (line 12) - bacteria that can kill
B "...the emotional meaning of text..." (lines 16-17) - the meaning of a sentimental text
C "...complex syntactic rules..." (line 35) - difficult language regulations
D "...seemingly conflicting cases..." (line 36) - cases that are apparently doubtful
E "...('the region's largest economies...' " (line 60) - economies of highly populated regions