Refer to the exhibit.

What JSON code correct represent the step in the OmniScript Structure panel shown?
A)

B)

C)

D)

A customer sets up two LWC OmniScripts, one embedded into another. AccountId is set in a Set Values element in the parent OmniScript. The Accountid set in the parent OmniScript is used to set another Set values element ContextAccountId in the emvedded OmniScript. The embedded OmniScript is activated.
While previewing the OmniScript flow from the parent, it is found that Account I set correct in the parent OmniScript. However ContextAccount in the embedded OmniScript is not set with the Accountid from parent OmniScript. On previewing the embedded OmniScript individually. It is found that ContextAccountId is set correctly.
What is the reason for this? Refer to the exhibit below.