Which option is the best opening for a cover message for a solicited job?

Dan Brown told me that you guys are seeking a market researcher to do some work on a marketing campaign. I've enclosed a summary of my qualifications for you.

An individual from your company told me that FedMax is seeking an experienced employee to work on a new product campaign. I've enclosed a summary of my qualifications that demonstrates a readiness for this position.

Dan Brown, a member of your marketing team, told me that FedMax is seeking an experienced market researcher to work on a new product campaign. Enclosed is a summary of my qualifications that demonstrates my readiness for this position.