Which of the following is an example for "pull" strategy?

A$.$ Shedd Aquarium Facebook post: $"$If you visited recently, you may have noticed that the penguins look a little $...$ different, but it's totally normal. It's molting season! Every year the penguins lose and replace all their feathers at once in what scientists call a "catastrophic molt."

B$.$ Sponsored content on LinkedIn.

C$.$ Sponsored link to Frasca Pizzeria when someone searches for "Italian Restaurants near me$".$

D$.30-50\%$ Off All Tops and Sweaters on the Express website.