The signature effect means that when people write their names on paper, the self-awareness in the brain will be strengthened. At this time, when you see something you like, it is easier to associate the item with yourself, resulting in ideas such as "this thing really suits me" To stimulate the desire to buy. According to the above definition, which of the following can the following phenomena be explained by the signature effect? ['Courier companies adhere to the "signature first and then inspection" approach.', 'Taking real-name donations can raise more funds.', 'The intermediary company requires the tenant to sign the "House Inspection Agreement" before the house inspection.', "Before the operation, the patient was asked to sign the `` Informed Consent Form ''."]