The correct answer is the last option.
To credit a source means to ACKNOWLEDGE WHERE YOU FOUND A SOURCE. In order to avoid plagiarism, the writer has to cite the sources where he found information, being the most common citation formats APA or MLA. The citation style to use will depend on the topic to discuss in the paper.
Answer:
designing and maintaining the bridge structure
Explanation:
Number one is the USA number two is C
Anything that gets in the way of effective communication
