Final answer:
Starch is the complex carbohydrate likely recently consumed, as it is commonly found in foods such as potatoes, bread, and pasta, and provides energy upon digestion. Option a is correct.
Step-by-step explanation:
The complex carbohydrate that you are most likely to have eaten recently is a) Starch. Starch is a complex carbohydrate or polysaccharide, which consists of many glucose units connected together. Foods such as potatoes, breads, and pasta are common dietary sources of starch, and they provide energy to the body once digested.
Unlike sucrose and fructose, which are simpler forms of carbohydrates known as disaccharides and monosaccharides respectively, or cellulose, which is a complex carbohydrate that humans cannot digest, starch is readily broken down into sugars during digestion to supply our cells with energy.