They germans used u-boats
Answer:
D. All of the above.
Explanation:
All of those things are ways that companies use to create energy.
That which is an example of a complex sentence is: As industrial robots became more common, many laborers who lacked skills lost their jobs.
A complex sentence is a sentence with one dependent clause and one independent clause.
In the sentence above, we find an example of a dependent and independent clause being used to form a complex sentence.
The first half of the sentence separated by the comma is the dependent clause while the second half is the independent clause.
Learn more about complex sentences here:
brainly.com/question/10838574
