When lodging a letter of objection against a notice of assessment, which one of the following statements is correct? Select one: a. Your objection must be based on cases. b. The taxpayer can only object against the assessment. C. The letter of objection must be self-amended to avoid any penalties. d. The letter of objection must be signed by the taxpayer. e. The letter of objection must be posted to the Commissioner within 5 years of the notice of assessment