Subfloor uneven by kitchen and dining room blend

[grubburg]

Looking to continue/blend my hardwood from dining room into kitchen.

Kitchen subfloor is about 1/2 inch higher than dining room subfloor.

I'm a newbie.

Options:
1. Make kitchen subfloor thinner
2. Make a gradual ramp
3. Make kitchen hardwood sanded down and dinner than dining room

Any ideas? New here. Thanks.

 

[grubburg]

 

[grubburg]

 

[grubburg]