$100M after traveling to every single country in the world within 4 years or $500M after traveling to every single country in the world within 6 months

Option A: You will receive $100M, tax-free, but only after stepping foot on every single country in the world for at least 1 week within 4 years.

Option B: You will receive $500M, tax-free, but only after stepping foot every single country in the world for at least 12 hours within 6 months.

Rules:

For Option A, you may use any type of travel.

For Option B, private jets and yachts and other private vehicles will be forbidden. Only air travel through commercial will be allowed.

For Option A, you may stay at any hotel and dine at any restaurant.

For Option B, you may only stay at hotels and dine in restaurants within 3 stars or less.

For both options, all travel, food, and hotels are all covered.

What would you accept?