I would say D. No change Nesessary.
Answer:
dont have any , sorry babes
Explanation:
.....
<span>In iceland they use
65% geothermal energy
20% </span><span>hydroelectric energy
15% </span><span>fossil fuels</span>
Main clause <span> can stand alone as a sentence .</span>
A shift in thought can be indicated by the use of C. an em dash.
An em dash is used to set of an interruption that is closely relevant to the sentence but is not grammatically part of it. These set of interruptions can be found in a list, illustration, restatement, shift in thought or tone, summary, or dramatic point.
Semicolon (;) is used to connect independent clauses.
Ellipses (. . .) are used to indicate that material is missing in the sentence or passage.