Atlantis Software Company ______ its clients complete satisfaction with all its products.
 
【正确答案】 D
【答案解析】 本题考查动词辨析。guarantee sb. sth. 意为“向某人保证某事”,故D项为正确答案。request“请求、需要”,admit“承认、准许”,agree“同意、认同”,均不符合题意,故排除。