Answer:
A. is where voters elect one member from their district to the House of Representatives and to their state legislature.
Step-by-step explanation:
The electoral district that have one officeholder in legislature is called single-member district. Multi-member districts is the opposite of single member district. Single member districts are used in many electoral systems such as range plurality and runoff voting.
In India, the member of lower house of parliament are elected from single member districts while the member of upper house from multi-member districts. In Singapore president is elected form both multi-member and single-member districts.