Answer:
The answer is a. introductions; conclusions
Step-by-step explanation:
Effective business writers use introductions to help readers prepare for upcoming information and conclusions to help them verify and clarify what they've just read.
Introduction is a beginning section which expresses the reason and objectives of the accompanying composition. The presentation regularly depicts the extent of the archive and gives the short clarification or rundown of the report.
The conclusion is planned to enable the reader to comprehend why your exploration should matter to them after they have finished reading the paper.