Which of the following would be a potential cause of sick-building syndrome?

Tobacco smoke

Mold spores

Carbon monoxide

All of the above

According to the earth science reference tables, during which geologic time period were the continents of north america, south america, and africa closest together?

Compare the quantity in column a with the quantity in column b. pa p a is tangent to the circle at a. column a column b ap a p ax a x question 4 options: the two quantities are equal. the quantity in column a is greater. the relationship cannot be determined from the information given. the quantity in column b is greater.

Because its government strictly controls its economy, north korea has a economy. a. command b. mixed c. traditional d. free market