Concept:The colonial governor's authority largely came from his ability to control legislation.
Explanation:The British colonial governor in West Africa held sweeping powers because he could exercise veto power over decisions of local legislative councils.
With veto power, the governor could reject or overrule any law or policy proposed by these councils.
This meant that no major decision could become law without his final approval.
As a result, the governor had the final say in colonial administration, making his authority supreme.
Other options like land tenure, drafting laws, or tax collection only described limited functions, not the overall basis of his sweeping power.
Answer:D. veto power