It should be pointed out that high growth rates of both First-Class advertising and Standard A mail have contributed to shifting the balance in favor of more advertising than non-advertising mail in the Postal Service mailstream.
First Class advertising mail has grown faster than Standard A mail.
mnli hypothesis: First Class advertising mail has grown faster than Standard A mail. premise: It should be pointed out that high growth rates of both First-Class advertising and Standard A mail have contributed to shifting the balance in favor of more advertising than non-advertising mail in the Postal Service mailstream.