Large quantities of tritium were released into the atmosphere in the 1950s and 1960s during atmospheric nuclear testing. this tritium fell back to earth in precipitation. assume that the precipitation joins runoff that goes directly to an open watershed. where would you expect to find the tritium next? a. in a closed watershed b. in the atmosphere c. in an iceberg d. in the ocean

 D. In the ocean

A watershed can be defined as regions of land where all surface water drains into the same place. It is a land that is occupied with water drained from interconnected  rivers, and lakes.  These drainage streams may aggregate in the ocean.

According to the above information the open watershed system likely to dispense off tritium in the ocean because the open watershed water may flow and combine with other reservoirs of water like ocean.

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explanation:

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.