What solution would give the BEST performance increase?

A company is running an application built on AWS Lambda functions. One Lambda function has performance issues when it has to download a 50MB file from the Internet in every execution. This function is called multiple times a second.

What solution would give the BEST performance increase?
A . Cache the file in the /tmp directory
B . Increase the Lambda maximum execution time
C . Put an Elastic Load Balancer in front of the Lambda function
D . Cache the file in Amazon S3

Answer: A

Explanation:

https://docs.aws.amazon.com/lambda/latest/dg/runtimes-context.html