GMAT Sentence Correction (SC) | Re: Rarely deeper than 25 feet and broader than 18 feet, but it extended 2

Rarely deeper than 25 feet and broader than 18 feet, but it extended 20 km around the green hills of Greensville, United States, the regional canal connected the Tomes River at Bucon to the Great Plains at Los Gatos, offering an exciting picnic spot to the central community of the local town.

(A)Rarely deeper than 25 feet and broader than 18 feet,but it extended 20 km around the green hills of Greensville, United States , the regional canalconnected
the colored portion changes the construction, leading to modifier wrongly placed