Which of the following is a characteristic of durable scientific knowledge?

a - it remains unchanged over time.

b - it is rarely subjected to examination.

c - several scientists' investigations support it.

d - similar investigations yield dissimilar results.

A - It remains unchanged over time.

Explanation:

Durable means that something can exist for a long time without much change.

B and C are wrong. Scientific knowledge must always be examined and checked by other scientists.

D is wrong. If similar investigations yield dissimilar results, the theory must be modified or replaced.

C

Explanation:

think about it, durable meaning it has lots of support behind it.  and D isn't right because it says dissimilar. A cant be right because something cant be durable if it is unchanged over time. B isn't right because if the data is rarely subjected to examination then the data wouldn't matter and therefore cant be used as it isn't a durable piece of information.

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answer:

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