Under the AWS shared responsibility model, the company is responsible for certain tasks when using AWS Lambda. The correct answers are 'C. Developing the business logic' and 'E. Configuring IAM access for Lambda'. AWS Lambda is a serverless compute service, which means AWS manages the infrastructure and the operating system (hence options A and B are not the company's responsibility). The company must write the business logic code that will be executed by Lambda (C). Additionally, they must provide IAM access to ensure the Lambda function can access other AWS resources as needed (E). The installation of the runtime environment (D) is managed by AWS, as Lambda supports multiple programming languages and automatically installs the necessary runtime.