Concept:Rice requires standing water in level fields, so the irrigation method must prevent rapid drainage.Explanation:Basin irrigation floods a nearly level area enclosed by ridges or dikes.This allows water to remain ponded, which is essential for rice cultivation.Wild flooding is uncontrolled and uneven.Furrow and border strip methods move water along channels or strips and do not maintain flooded conditions well.Therefore, basin irrigation is the widely used surface method in rice fields.Answer:A. basin irrigation