All the above given options will lead to shift in the demand curve except Price level changes.
C. price level changes.
Step-by-step explanation:
A demand curve can shift to left or right depending upon several different factors. If the demand curve shifts to left which is caused due to decreased consumer spending.
This may be a result of increased prices or taxes. If the demand curve shifts to right it means the consumer spending has increased which is a result of decreased taxes and deterioration in economy, decreased job security, etc.