Which type of tax is characterized as having a "fixed" rate? a) regressive tax b) progressive tax c) inheritance tax d) proportional tax

The correct answer is D) Proportional tax.  

The type of tax that is characterized as having a fixed rate is Proportional tax.  

Among the income taxes, the proportional tax, the same proportion of the tax is levied in all the registered people that pay taxes. It does not matter the income they get, low, medium or high class. The opposite of this tax is the progressive tax, where the tax is adjusted by income.

2. a land bridge connected asia and north america thousands of years ago.

4. crossing the land bridge would have been simple for the first migrants.

5. people might have crossed a land bridge while hunting animals.