D. If a hypothesis is not contradicted after a lot of testing, it may be considered a law.
<h3><u>Explanation;</u></h3>
A hypothesis is a reasonable guess that is based on what is observed on the natural world.
A scientific theory is an in-depth explanation about an observed phenomenon. It contains one or more hypothesis that have been supported by repeated testing.
A law on the other hand is a statement about an observed phenomenon or a unifying concept.
The reason for this is that <span>these two ketones are so small that they have only one possible ketone. So the number is usually omitted. Normally the ketone group needs a number but these two are exceptions</span>
