Which sentence uses a noun clause as a direct object?

ʜᴇʏᴀᴀ!! ɪ'ᴍ ᴘɪɴᴋʏ ᴀɴᴅ ɪ'ᴍ ʜᴇʀᴇ ᴛᴏ ɪɴꜰᴏʀᴍ ʏᴏᴜ ᴛʜᴀᴛ ʏᴏᴜ'ʀᴇ ᴀɴꜱᴡᴇʀ ɪꜱ...♡

Explanation:

Rob explained what he liked on his sandwiches to the chef. This is the sentence that uses a noun clause as a direct object. See the underlined structure and the explanation below:

explain(ed) is the main verb and it is transitive; it needs a direct object .

what he liked on his sandwiches is the noun clause. It can be replaced by a noun phrase: this fact - Rob explained this fact to the chef.- ; and what he liked on his sandwiches is a clause because it has a subject and a predicate: he (subject) + liked on his sandwiches ( what -placed at the beginning) (predicate).

It is said that the president did not think much of his speech since he heard only polite applause when he finished. But perhaps this was more of a stunned silence than a hostile crowd. In two short minutes, Lincoln was able to establish that