Mark the only correct statement.

a) "this change" (line 4) refers to "reasons" (line 4).

b) "that of" (line 26) refers to "years" (line 26).

c) "its" (line 42) refers to "industry" (line 39).

d) "The latter" (line 47) refers to "gas produced domestically" (lines 45-46).

e) "This" (line 53) refers to "(E&P) sector equipment" (line 56).

Responda: Mark the only correct statement.