Concept:Mining in Africa faces many challenges, but a shortage of unskilled labour is not one of them.
Explanation:Africa has an abundant supply of unskilled labour for mining activities.
The real mining problems include the use of obsolete technology, shortage of power, and inadequate foreign capital.
A lack of skilled labour, not unskilled labour, is the more common difficulty.
Therefore, the option that is NOT a problem is inadequate unskilled labour.
Answer:A. inadequate unskilled labour