How should the developer construct an Explore using the order_items view as the base view?

A developer needs to model out LookML to convert existing reports into Looker.

The existing reports are:

Report 1: A report with order and order_items data, which finds the order with the largest total value of the order_item prices.

Report 2: A report with order and order_items data, which finds the order with the largest total number of products ordered.

Report 3: A report with data on every product, whether or not it has been ordered.

Each database table used is updated in real time as orders are made.

How should the developer construct an Explore using the order_items view as the base view?
A . Create one persistent derived table to calculate Report 1, create one persistent derived table to calculate Report 2, and join in the products view with a full_outer join.
B . Create one persistent derived table to calculate Reports 1 and 2, and join in the products view with a full_outer join.
C . Create one ephemeral derived table to calculate Report 1, create one ephemeral derived table to calculate Report 2, andjoin in the products view with a left_outer join.
D . Create one ephemeral derived table to calculate Reports 1 and 2, and join in the products view with a full_outer join.