B, C and D. Though if the question wants you to pick one I would go with C
The first advertising agencies were? Answer Newspaper Space Brokers hope this helps
Tar, carbon monoxide, arsenic, vinyl chloride, and/or formaldehyde
The root word which means "red" is a. erythr/o.
Just think about biology - you should know that red blood cells are called erythrocytes, where you can obviously see that root word.
Leuk/o refers to white color, and the other two options do not refer to colors at all.
<span>-be positive (the mind is important)
- Be put in positions of trust
-to concentrate
-well <span>breathe</span></span>
