Money laundering is the illegal conversion of criminal proceeds into seemingly legitimate funds, or the use of legitimate earning for illegal activity. which one of the following is not a red flag indicating money laundering? 

the use of legitimate earning for illegal activity.

Explanation: because it is not a red flag indicating money laundering.

The error are underlined in the sentence below and the correct sentence is written:

1. Me and Brandon decided to give the speech early.

Correct sentence: Brandon and I decided to give the speech early.

2. I have been working very hardly these past few weeks.

Correct sentence: I have been working very hard these past few weeks.

3. A ring that my boyf**end gave me yesterday looks expensive.

Correct sentence: The ring that my boyf**end  gave me yesterday looks expensive.

4. Although she finished her works, she stayed at the office two.

Correct sentence: Although she finished her work, she stayed at the office too.

Explanation:

I have been able to show the error in each of the sentences and at the same time, I have made corrections to the errors.

We can see that in no. 1, the use of "me" isn't appropriate because "me" is an object pronoun. "I" is the best pronoun that fits in that sentence because it is a subject pronoun.

In no. 2, the use of "hardly" an adverb is not appropriate in the sentence. The correct word is "hard", an adjective to modify the noun "working". In no. 3, the article "A" is not appropriate in the sentence. The correct article to use is "The". It shows that the "specific" given to her by her boyf**end is expensive.

In no. 4, "works" and "two" are wrong. The correct words to use in the sentence are "work" and "too".