The correct answer is A. Between 150 and 200 words
Step-by-step explanation:
In academic texts, the abstract refers to a summary of the document that is presented at the beginning of it to inform readers about the content they can expect while reading. This along with other aspects such as margins, font, table of contents and citations are in many cases guided by APA manual that sets specific parameters for academical writing that are updated every year. In the case of the APA 6th edition manual, this states the abstract should be always between 150 and 200 words that are about ten to twenty lines and should contain only key information. Therefore, per APA 6th edition the length of the abstract is between 150 and 200 words.