NEET Biology question

Some cells are placed in a solution of glucose to measure the rate of diffusion. As the concentration of the glucose solution is increased, the diffusion rate increases simultaneously. However, when the concentration of the glucose solution reaches above a certain level, the diffusion rate no longer increases. Which statement best defines the mechanism of glucose transport in the cells?

• (A)Transport of hydrophilic substances along the concentration gradient through a fixed membrane transport protein without the involvement of energy expenditureCorrect
• (B)Transport of hydrophilic substances along and against the concentration gradient via carrier proteins
• (C)Active transport via transporter proteins
• (D)Facilitated diffusion without carrier proteins