Including not only the City of San Francisco and Marin County. where within their boundaries the bridge exists, but Napa and Del Norte counties as well. is the Golden Gate Bridge and Highway District.A. Including not only the City of San Francisco and Marin County, where within their boundaries the bridge exists, but Napa and Del Norte counties as well, is the Golden Gate Bridge and Highway District.
B. The Golden Gate Bridge and Highway District includes not only the City of San Francisco and Marin County, the boundaries of which the bridge itself exists within, but also Napa and Del Norte counties.
C. The City of San Francisco and Marin County, whose boundaries of which the bridge itself exists within, are not only included in The Golden Gate Bridge and Highway District, but so are Napa and Del Norte counties as well.
D. The Golden Gate Bridge and Highway District includes not only the City of San Francisco and Marin County but also Napa and Del Norte counties, the boundaries of which the bridge itself exists within.
E. Including not only the City of San Francisco and Marin County, the Golden Gate Bridge and Highway District, where within their boundaries the bridge exists, but also Napa and Del Norte counties as well.