Which of the following best explains how groundwater in the confined upper Floridan aquifer could be thousands of time older than water at the springs along the Suwannee River? Group of answer choices Because it is not possible for a confined aquifer to receive any recharge through a confining unit. Therefore any water must be from when the aquifer was originally deposited. Groundwater flows slowly through confining units. Because the effective porosity of the confined upper Floridan aquifer is likely to be smaller than in the unconfined region near the Suwannee River. Because the confined upper Floridan aquifer has a lot of caves