When a theory is disaproved by further evidence, which of the following occurs?

New data must be found to support it

Explanation:

When a theory is disproved by further evidence, then a new data must be found to support it. As the previous approach to the theory was disproved then new ways should be explored to support it.  If the same core approach would be used to find answers then it may be difficult to get it supported by the theory. There must be new data that has to be developed with logical approach and must be supported by evidence.

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.