Which one of the following was NOT a feature of railways in colonial India?

• A. The main purpose of the setting up of railways in India was to serve the interest of the empire.
• B. British capital investments were invited with 15% guaranteed interest to be paid if necessary from Indian revenues.
• C. The construction work disturbed ecology.
• D. The construction of the railways was planned in such a way that it connected the internal markets with the ports, but provided no interconnection between internal market cities.