C. The hypothesis mentions the educated guesses an observation
<h3><u>Explanation;</u></h3>
In the scientific method, the hypothesis is a guess at an answer to the problem proposed. However, it isn't a random guess. Between the hypothesis and problem is a step of gathering data.
Then, based on your data, you postulate what the answer to the question is. It's a guess, as you don't know for certain, but it is educated, as you gather data prior to making a guess.
<em><u>An educated guess is a guess based on evidence or knowledge you already have.</u></em>
Carbon has 4 valence electrons so to gain a noble gas electron configuration, which has 8 valence electrons and is the most electrically stable, carbon needs 4 more electrons.