Somebody who has type 1 diabetes has:Group of answer choicesHigh blood sugar levels all the time.Large, and uncontrolled, variations in blood glucose levelsLow blood sugar levels all the time.An inability to take up glucose into their muscle cells.

Type 1 diabetes is a condition where the body's immune system attacks and destroys the insulin-producing beta cells in the pancreas. Insulin is a hormone that helps regulate blood sugar levels by allowing glucose to enter cells, where it can be used for energy. Without insulin, glucose builds up in the bloodstream, leading to high blood sugar levels.

So, the correct answer is: Large, and uncontrolled, variations in blood glucose levels.

This is because without insulin, or with insufficient insulin, glucose cannot enter cells and remains in the bloodstream. This can lead to periods of both high blood sugar (hyperglycemia) and low blood sugar (hypoglycemia), depending on diet, activity level, illness, and other factors.

It's important to note that people with type 1 diabetes do not have an inability to take up glucose into their muscle cells, but rather, they lack the insulin necessary to facilitate this process. With insulin treatment, glucose can be taken up by the cells.