In an Enterprise 2.0 account, the Contact Delete feature can only be used from the Parent account. This centralization ensures that contact deletion is managed consistently and in compliance with organizational policies.
References:
Salesforce Marketing Cloud Contact Builder
Contact Management in Enterprise 2.0

The Sent data view contains records of all emails that have been sent, including details such as JobID, EventDate, and other relevant information. To gather the required information about emails deployed in the last seven days, the Sent data view should be used.
* Query Example:
SELECT JobID, EventDate, COUNT(*) as SentCount FROM _Sent WHERE EventDate >= DATEADD(day,
-7, GETDATE()) GROUP BY JobID, EventDate
Salesforce Data Views

To alternate the background color of rows in an HTML table using AMPscript, the MOD function can be used to determine if the row number is odd or even.
* MOD Function: The MOD function returns the remainder of a division operation. By using MOD (@numerator, 2), the function returns 1 for odd rows and 0 for even rows, allowing the background color to be set accordingly.
* AMPscript Example:
%%[ SET @numerator = 1 FOR @i = 1 TO RowCount(@rows) DO SET @color = IF MOD(@numerator, 2)
== 1 THEN 'Red' ELSE 'White' ENDIF SET @numerator = ADD(@numerator, 1) ]%% <tr style=" background-color: %%=v(@color)=%%;"> <!-- Row content --> </tr> %%[ NEXT @i ]%% Salesforce AMPscript Functions

When preparing data to be used in Contact Builder, the following factors should be taken into consideration:
* Assigning data relationships and primary keys across all channels (A) - This ensures that data is linked properly and can be utilized across different marketing channels.
* Verifying data address marketing needs (B) - Ensuring that the data aligns with the marketing goals and requirements.
* Normalizing data to reduce redundancy (E) - Organizing the data to eliminate duplicate entries and improve efficiency.
References:
Salesforce Marketing Cloud Documentation on Contact Builder
Data Preparation Best Practices