The correct answer is 'can't'. 'Can't' is used for negative deductions when we are almost certain something is not true based on evidence. Example: 'He can't be in London because I just saw him here.' Other modals: 'must' is for positive deductions (e.g., 'They must be asleep'), 'might' and 'could' express possibility but not certainty. Deduction modals help us make logical conclusions from observed facts.

Break down complex topics into smaller, manageable chunks for easier recall.

Zambia

• Joseph Soko – 101 pts

• Distance of A Straight Line
• Mid-point of A Line
• Equation of a Straight Line
• Parallel and Perpendicular Lines
• COMMUNICATION SYSTEMS