GMAT Sentence Correction (SC) | Re: The three political parties that make up the Australian coalition

The three political parties that make up the Australian coalition have been in alliance since 1922 and nowinclude the Country Liberal Party, which was established in 1978 and is known for contesting every NTLA election since then.

a) include the Country Liberal Party, which was established in 1978 and is

b) include the Country Liberal Party, having been established in 1978 and

c) include the Country Liberal Party, having been established in 1978 and being

d) includes the Country Liberal