The manual tester's mindset — quiz

A new feature lets users upload a profile picture. The spec says "accept JPG and PNG up to 5MB." Which approach best reflects a strong manual tester's instincts on first contact?

• Upload one valid JPEG and confirm it appears on the profile
• Probe the edges — a 6MB file, an HTML file renamed to .png, an empty file, a corrupt JPEG, and a 0-byte image
• Run only the developer's automated tests and report pass/fail
• Wait for the spec to enumerate every edge case before testing