Final answer:
The statement linking increased consumption of refined carbohydrates with obesity is true. Refined carbohydrates can cause quick spikes in blood sugar, contributing to weight gain and associated health problems.
Step-by-step explanation:
The statement that increased consumption of refined carbohydrates in the past few decades has been implicated in causing obesity is true. Consumption of too many refined carbohydrates, such as white bread and soda, may contribute to obesity by leading to dramatic spikes in blood sugar levels.
These simple carbohydrates are more easily and quickly broken down in the digestive system to glucose than complex carbohydrate molecules found in vegetables and whole grains, thus increasing the risk of obesity and related health issues. Evidence suggests that diets high in fats and carbohydrates and low in vegetables can lead to chronic health problems and contribute to the rising rates of obesity.