UCD does not list their acceptance rate by major. The overall acceptance rate which is not major specific for an applicant with a UC GPA of 3.86 (range 3.80-4.19) was 41%. If you are looking for a 70% acceptance rate, you would need to look at another UC such as Santa Cruz, Riverside or Merced and even then, there is no guarantee. GPA/Test scores/HS course rigor, Essays and EC’s are all contribute to your chances so too many variables to determine your actual chances.
2018 Freshman admit rates for UC GPA of 3.80-4.19 capped weighted and not major specific:
UCB: 10%
UCLA: 9%
UCSD: 34%
UCSB: 38%
UCD: 41%
UCI: 38%
UCSC: 70%
UCR: 84%
UCM: 95%
The Cal states admit by GPA/Tests which translate into an Eligibility index and then you are ranked by your EI and intended major. Acceptances are a bit more straightforward so you can gauge your chances better especially if you know the EI thresholds for any particular major.