From experiments 1 and 2, the student hypothesized that the cells being investigated ultimately depend on energy to operate the sodium-glucose transport mechanism. Is this hypothesis supported by the data?(A) Yes, because Figures 1 and 2 show that glucose crosses the cell membrane in exchange for phosphate.(B) Yes, because Figure 1 shows that a Na+ gradient drives glucose transport, and Figure 2 shows that ATP maintains the Na+ gradient.(C) No, because Figure 2 shows that extracellular glucose and ATP concentrations are independent.(D) No, because Figure 1 shows that glucose crosses the cell membrane indefinitely in the absence of exogenous energy.

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